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Weather experts said that values on could even nudge 28C in London today as the mercury hits levels not seen since last August.

Although it won’t get quite as hot here in North Wales with some light winds and low cloud meaning temperatures will peak at around 22C at best.

Sunshine over a field in Rhuallt, Denbighshire on the hottest day of the year in 2018 (Image: North Wales Daily Post)

A Met Office forecast said: “With light winds it will feel warm in the sunshine, but fresher towards the coasts where some low cloud is likely. Maximum temperature 22C.

“It is going to stay dry overnight with largely clear skies at first, but cloud and some fog will spill in from the west.

“The fog and most of the cloud will clear to leave another sunny and very warm day for many on Friday.”

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Cooler air will start to move over the far north of the British isles during Friday allowing more cloud cover and a risk of showers.

The Met Office is predicting a 50-50 chance of thunderstorms arriving in Rhyl at 4pm on Saturday but it will stay warm at 21C before temperatures dip to 15C on Sunday.

There is also the chance of an isolated thundery shower on Sunday with runners in the London Marathon having to face heat and hydration issues with temperatures topping 20C.

View of Colwyn Bay and the A55 (Image: North Wales Daily Post)

More widespread cooler air will arrive from the west next week and it will feel much chillier after the current spell of blazing sunshine.

Forecaster Amy Hodgson, of The Weather Channel, said: “Pressure will then start to lower to the north-west of the British Isles over the weekend.

“Cooler air from the Atlantic will start to move in across the British Isles from Sunday, triggering some heavy and thundery downpours, with localised flooding possible across the British Isles through the afternoon."

She added: “Temperatures will then start to lower closer towards normal through next week as low pressure passes across northern Europe.

“Winds will become westerly, with rain and showers across northern and central Europe.”